This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
electrical:solar:charge_controller [2018/11/20 13:06] frater_secessus |
electrical:solar:charge_controller [2019/05/11 21:10] frater_secessus [how to choose] |
||
---|---|---|---|
Line 29: | Line 29: | ||
- DC-DC downconvert excess voltage to amps | - DC-DC downconvert excess voltage to amps | ||
- | During Bulk phase when maximum power is required((or at other time when loads + charging >= panel output)) the controller will run the panels at Vmp (the maximum power point). | + | When maximum power is required((in Bulk or at other time when loads + charging >= panel output)) the controller will run the panels at Vmp (the maximum power point). |
[[http:// | [[http:// | ||
Line 53: | Line 53: | ||
==== shunt ==== | ==== shunt ==== | ||
[[http:// | [[http:// | ||
- | Shunt controllers are very simple devices that charge to a given voltage [[electrical: | + | Shunt controllers are very simple devices that charge to a given voltage [[electrical: |
> ...PWM [and] shunt controllers apply full panel voltage, or something close to it, across the battery terminals, at a duty cycle (fast for PWM, slow for shunt) that keeps the battery happy, and the controller monitors the battery voltage and then adjusts the PWM duty cycle accordingly, | > ...PWM [and] shunt controllers apply full panel voltage, or something close to it, across the battery terminals, at a duty cycle (fast for PWM, slow for shunt) that keeps the battery happy, and the controller monitors the battery voltage and then adjusts the PWM duty cycle accordingly, | ||
Line 77: | Line 77: | ||
* battery banks are cycled deeply on a regular basis so more time is spent in Bulk | * battery banks are cycled deeply on a regular basis so more time is spent in Bulk | ||
- | * nominal 12v panels have a relatively high Vmp (>=18v) | + | * nominal 12v panels have a relatively high Vmp (> |
* [[https:// | * [[https:// | ||
* high latitudes | * high latitudes |